The question of whether "fighting dogs" are truly dangerous is a controversial topic and is often viewed from different perspectives. "Fighting dog" is not a scientifically defined term, but rather a colloquial expression generally applied to certain dog breeds considered potentially dangerous.
An important point is that a dog's dangerousness does not solely depend on its breed, but on various factors, including the dog's individual disposition, its socialization, training, environment, and living conditions. It would be unfair and inaccurate to label an entire breed as dangerous, as there are well-socialized and well-trained dogs within these breeds.
However, there are some breeds that have strong jaw muscles and other physical characteristics that can make them potentially more dangerous if they are in the wrong hands or mistreated. These often include breeds such as the American Pit Bull Terrier, Rottweiler, Doberman, Staffordshire Bull Terrier, and some others.
Most countries have specific laws or regulations governing or even prohibiting the ownership and keeping of breeds classified as "fighting dogs." These laws are often enacted to reduce the risk of dog attacks and ensure public safety.
It is important to emphasize, however, that the majority of dogs, including some breeds referred to as "fighting dogs," can be friendly, loving, and good-natured, as long as they grow up in a loving environment, are well-trained, and properly socialized.
The most important thing is that dog owners, regardless of breed, are aware of the responsibility they bear when owning a dog and are mindful of their duties regarding proper training and socialization. Furthermore, potential dog owners should thoroughly understand and comply with the specific laws and regulations of their country or region regarding the ownership of certain breeds.